(function($) {

	$.suggest = function(input, options) {
		var $input = $(input).attr("autocomplete", "off");
		var $results = $(document.createElement("ul"));
		
		var timeout = false;
		var prevLength = 0;
		var cache = [];
		var cacheSize = 0;

		$results.addClass(options.resultsClass).appendTo('body');

		resetPosition();
		$(window).load(resetPosition).resize(resetPosition);

		$input.blur(function() { setTimeout(function() { $results.hide() }, 200); });

		try { $results.bgiframe(); } catch (e) { }
		if ($.browser.mozilla) $input.keypress(processKey2);
        $input.keyup(processKey);
        $input.keydown(processKey2);
        
		function resetPosition() {
			var offset = $input.offset();
			var logooffset = $(".logo").offset();
			var width = $(input).width();
			if($(input).siblings(".zt_s_submit").length == 1){
				width = $(input).parents("div").width() - $(input).siblings(".zt_s_submit").width();
			} else if($(input).css("padding-left") != '0px' || $(input).css("padding-right") != '0px'){
				var left_length = $(input).css("padding-left").length;
				var right_length = $(input).css("padding-right").length;
				width += parseInt($(input).css("padding-left").substring(0, left_length-2))
						+ parseInt($(input).css("padding-right").substring(0, right_length-2));
			}
			$results.css( {
				top : (offset.top + input.offsetHeight-1) + 'px',
				left : offset.left + 'px',
				width : width
			});
		}

		function processKey(e) {
			if (/^9$|27$|38$|40$/.test(e.keyCode) && getCurrentResult()) {
				if (e.preventDefault) e.preventDefault();
				if (e.stopPropagation) e.stopPropagation();
				e.cancelBubble = true;
				e.returnValue = false;
				selectCurrentResult();

			} else if ($input.val().length != prevLength) {
				if (timeout) clearTimeout(timeout);
				timeout = setTimeout(suggest, options.delay);
				prevLength = $input.attr({"_val":$input.val()}).val().length;
			}

		}
		function processKey2(e) {
			if (/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) {
				if (e.preventDefault) e.preventDefault();
				if (e.stopPropagation) e.stopPropagation(); 
				e.cancelBubble = true;
				e.returnValue = false;
				switch (e.keyCode) {
				case 38: // up
					prevResult();
					break;
					
				case 40: // down
					nextResult();
					break;

				case 27: // escape
					$results.hide();
					break;
				}
				with($input)if(!getCurrentResult())val(attr("_val"));

			} else if ($input.val().length != prevLength) {
				if (timeout) clearTimeout(timeout);
				timeout = setTimeout(suggest, options.delay);
				prevLength = $input.val().length;
			}
		}

		function suggest() {
			var q = $input.val();
			if (q.length >= options.minchars) {
				cached = checkCache(q);
				if (cached) {
					displayItems(cached['items']);
				} else {
					window.sugresult = "";
					$.getScript(options.source + "&sw=" + encodeURIComponent(q)+"&t="+new Date().getTime(), function(data) {
							var txt = window.sugresult;
							$results.hide();
							var items = parseTxt(txt, q);
							displayItems(items);
							addToCache(q, items, txt.length);
			    });
				}
			} else {
				$results.hide();
			}
		}

		function checkCache(q) {

			for ( var i = 0; i < cache.length; i++)
				if (cache[i]['q'] == q) {
					cache.unshift(cache.splice(i, 1)[0]);
					return cache[0];
				}

			return false;

		}

		function addToCache(q, items, size) {

			while (cache.length && (cacheSize + size > options.maxCacheSize)) {
				var cached = cache.pop();
				cacheSize -= cached['size'];
			}

			cache.push( {
				q : q,
				size : size,
				items : items
			});

			cacheSize += size;

		}

		function displayItems(items) {

			if (!items)
				return;

			if (!items.length) {
				$results.hide();
				return;
			}

			var html = '';
			for ( var i = 0; i < items.length; i++) html += '<li>' + items[i] + '</li>';

			$results.html(html).show();

			$results.children('li').mouseover(function() {
				$results.children('li').removeClass(options.selectClass);
				$(this).addClass(options.selectClass);
			}).click(function(e) {
				e.preventDefault();
				e.stopPropagation();
				selectCurrentResult();
				$("#searchbutton").click();
			});
			resetPosition();
		}

		function parseTxt(txt, q) {
			var items = [];
			var tokens = txt.split(options.delimiter);
			for ( var i = 0; i < tokens.length; i++) {
				var token = $.trim(tokens[i]);
				if (token && token.length <= 17) {
					token = token.replace(new RegExp(q, 'ig'), function(q) {
						return '<span class="' + options.matchClass + '">' + q + '</span>'
					});
					items[items.length] = token;
				}
			}
			return items;
		}

		function getCurrentResult() {
			if (!$results.is(':visible')) return false;
			var $currentResult = $results.children('li.' + options.selectClass);
			if (!$currentResult.length) $currentResult = false;
			return $currentResult;
		}

		function selectCurrentResult() {
			$currentResult = getCurrentResult();
			if ($currentResult) {
				$input.val($currentResult.text());
				//$results.hide();
				if (options.onSelect) options.onSelect.apply($input[0]);
			}
		}

		function nextResult() {
			$currentResult = getCurrentResult();
			if ($currentResult) {
				$currentResult.removeClass(options.selectClass).next().addClass(options.selectClass);
			} else {
				$results.children('li:first-child').addClass(options.selectClass);
			}
		}

		function prevResult() {
			$currentResult = getCurrentResult();
			if ($currentResult) {
				$currentResult.removeClass(options.selectClass).prev().addClass(options.selectClass);
			} else {
				$results.children('li:last-child') .addClass(options.selectClass);
			}
		}
	}

	$.fn.suggest = function(source, options) {
		if (!source) return;
		options = options || {};
		options.source = source;
		options.delay = options.delay || 100;
		options.resultsClass = options.resultsClass || 'ac_results';
		options.selectClass = options.selectClass || 'ac_over';
		options.matchClass = options.matchClass || 'ac_match';
		options.minchars = options.minchars || 1;
		options.delimiter = options.delimiter || '\n';
		options.onSelect = options.onSelect || false;
		options.maxCacheSize = options.maxCacheSize || 65536;
		this.each(function() {
			new $.suggest(this, options);
		});
		return this;
	};

})(jQuery);